Index card



Feb. 20, 1951 O. M. B. SILLERUD INDEX CARD Filed Jan. 16, 1946 INVENTORI 051%? 446/701 MMZJM 67116900 ATTORNEYS Registered Feb. 20, 1951 INDEX CARD Oskar Magnus Bredesen Sillerud, Kristiansand 8., Norway, assignor to fistenfjeldske Handelskompani Aktieselskap, Oslo, Norway, a Norwegian concern Application January 16, 1946, Serial No. 641,543

In Norway May 19, 1943 Section 1, Public Law 690, August 8, 1946 Patent expires May 19, 1963 1 Claim. 1

The present invention relates to index cards of that type which consists of a double sheet of paper or other suitable material forming a front and a back side of the card, the upper and lower edge of which are fixed together in such a way that the card forms a flattened tubular body.

The object of this invention is to provide means whereby the cards will have a tendency to spread whenplaced adjacent each other in a card box or the like.

In order that the invention shall be readily understood, it will in the following be described with reference to the drawing, illustrating a preferred embodiment for the invention.

In the drawing,

Fig. 1 illustrates a cross sectional area through an index card of flattened tubular shape accordin to this invention.

Fig. 2 illustrates a corresponding cross section to a larger scale and with the leaf spring in position.

Fig. 3 illustrates a part of the card seen from the fiat side.

Fig. 4 illustrates another embodiment of the card.

In the drawing, I denotes the card proper. The two walls or front and back side of the card 4, 5 are preferably glued together along the lower edge 3 in such a way as is illustrated in Fig. 4, viz, that a narrow slot for the reception of the edge of the spring member 6 may be provided. The spring member 6 may be made from a very thin leaf of metal or other suitable material. Such spring members will, if they are made of metal, easily be pressed uneven, thereafter main- 2, but it is to be preferred to arrange the spring as shown in Fig. 4, where the lower edge is resided in a very narrow slot which is formed between the marginal edge of the front and back side 4 and 5 wherein these sides are glued together.

In free position, the two sides of the index card will very easily spread out from each other 2 or 3 mm. This spreading tendency may, however, easily be varied, but it is not necessary to obtain a very great spreading action before the desired result, viz, to be able to see the upper marginal edge of each card, is reached.

I claim: 1

An index card comprising a sheet of material folded upon itself to form a front and a back panel, the marginal edges thereof being joined so as to form a flattened tubular body, a tensioned leaf spring member positioned wholly between said panels, one end of said spring member being gripped between said joined marginal edges, the other end extending upwardly over a major portion of the height of said card, said spring being curved in opposite directions within its length to spread said panels apart, the upper portion of the spring retaining its position frictionally between said panels.

OSKAR MAGNUS BREDESEN SILLERU'D.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS taining a springy tendency for a long time. They Number Name Date may be produced as thin as 5/100 mm., i. e. that 1,121,151 Ulrich Dec. 15, 1914 they will practically not have any tendency to 1,476,920 Quigley Dec. 11, 1923 decrease the capacity of a given space in an index 1,835,678 Strassel Dec. 3, 1931 file and furthermore may easily be left in place 40 2,234,536 McDermott May 26, 1942 if the card is to be introduced into a typewriter in order to fill out certain data on the card. FOREIGN PATENTS The spring 6 may, however, also be introduced Number Country Date loosely between the side 4 and 5 as shown in Fig. 451,272 Belgium July 31, 1943 

